<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8"/>
        <title></title>
        <style type="text/css">
            #p1{text-decoration:underline;}
            #p2{text-decoration:line-through;}
            #p3{text-decoration:overline;}
        </style>
    </head>
    <body>
        <p id="p1">这是“下划线”效果</p>
        <p id="p2">这是“删除线”效果</p>
        <p id="p3">这是“顶划线”效果</p>
    </body>
</html>